When you download a paid or free app on Google Play, the app is connected to your Google Account. This means you can
reinstall downloaded apps to new or reset devices without purchasing them again.
source : Reinstall apps & games
This is About Apk apps.but for Download this, if you can download this again in
Old Device so you can Copy Downloading Link and Sign In With Purchased Device in New Device.
Also, as this link said : OIT HelpDesk - Knowledge Base
Your purchases are tied to your Google Account and can be installed an
unlimited amount of times on any device. So, for example, if you
remove "My Favorite Game" to save memory, you can reinstall it at a
later date with no charge by simply visiting My Apps. You can also
re-install apps from play.google.com from the My Android Apps section.
Sign in With purchased Google Account in
New Device, and Find what you want and Downloaded it.
Hope this helps.